How the Dog Pregnancy Calculator works
Methodology
The central estimate adds 63 days to the entered breeding date, with a broad 58–68 day planning window because mating date does not necessarily equal ovulation date.
Frequently asked questions
Is day 63 guaranteed?+
No. Timing from a mating date can vary. Contact your veterinarian for pregnancy confirmation and whelping guidance.
Important veterinary note
Calculator outputs are estimates for education and planning. They do not diagnose disease, replace a physical examination, or override advice from a veterinarian who knows your dog.